Cardiovascular System: Blood Vessel and Circulation

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What is the main function of the cardiovascular system?

Distributing oxygen and nutrients only

Assisting in digestion and waste removal

Carrying blood, nutrients, and hormones throughout the body (correct)

Transporting blood to the brain and back to the heart

Which structure forms a closed system of tubes to carry blood?

Blood vessels (correct)

Coronary arteries

Alveoli

Bronchi

In which blood vessel does the exchange occur between blood and tissue fluid?

Veins

Capillaries (correct)

Arteries

Venules

What is the main function of arteries?

Carry oxygen-rich blood away from the heart Signup and view all the answers

What substances are transported by the circulatory system?

Hormones, antibodies, WBC, enzymes, clotting factors, gases, waste substances, and more Signup and view all the answers

How does the circulatory system help regulate blood pressure?

By maintaining fluid balance and adjusting vessel diameter Signup and view all the answers

What type of blood do veins carry?

Oxygen-poor blood Signup and view all the answers

What is the function of the tunica media in blood vessels?

Control blood flow to different body regions Signup and view all the answers

What is the main function of arterioles?

Transport blood from small arteries to capillaries Signup and view all the answers

What is the main function of capillaries?

Allow for exchange of nutrients and waste products Signup and view all the answers

What is the composition of venules?

Only composed of tunica intima Signup and view all the answers

What characterizes elastic arteries?

Have elastic recoil preventing blood pressure from falling down when the ventricles are relaxed Signup and view all the answers

What is the function of muscular arteries?

Enable control of blood flow to different body regions Signup and view all the answers

What is the main function of small veins?

Transport blood from arterioles to small veins Signup and view all the answers

What is the composition of capillaries?

Composed of endothelium resting on connective tissue Signup and view all the answers

What do elastic arteries prevent when ventricles are relaxed?

Blood pressure from falling down Signup and view all the answers